Electrical testing instrument



FIG. 1 is a front elevational view of the electrical testing instrument showing my new design, the cord broken away indicating indeterminate length;

FIG. 2 is a top plan view of the upper and lower elements of the instrument of FIG. 1, the bottom plan being a substantially mirror image thereof; and

FIG. 3 is a left end elevational view of the upper element of the instrument of FIG. 1, the _left end elevational view of the lower element of the instrument of FIG. 1 omitted for ease of illustration, being substantially similar to that shown. 

The ornamental design for an electrical testing instrument, as shown. 